“I am now self-isolating, but I will continue to lead the government’s response via video-conference as we fight this virus,” Johnson said in the video message.

A Downing Street spokesman said Johnson, 55, experienced mild symptoms on Thursday – a day after he answered at the prime minister’s weekly question-and-answer session in the chamber of the House of Commons.

A day earlier, Prince Charles, the eldest son and heir to Queen Elizabeth II, also tested positive with mild symptoms.

“The Prince of Wales has tested positive for coronavirus,” Charles’ office said in a statement. “He has been displaying mild symptoms but otherwise remains in good health and has been working from home throughout the last few days as usual.

There are more than 11,600 confirmed coronavirus cases in the UK. More than 570 people have died from the disease.